Data through April 2026
Running cost · Room Air Conditioners · ENERGY STAR certified
TCL H18W4KW-CA
The TCL H18W4KW-CA is certified at 938 kWh per year (based on 750 standardized hours), roughly $177 at the national average — though seasonal use means your real bill lands in a few months, not twelve. Even among certified models it's on the thirsty end: 76% more electricity than the median room air conditioner, ranked 358 of 396. The same unit costs $116 a year in North Dakota but $437 in Hawaii — electricity rates, not the appliance, make the difference.
Estimated annual running cost · U.S. average rate 18.8¢/kWh
$177/yr
- Per month
- $14.71
- Per day
- 48¢
- Certified use
- 938 kWh/yr
- Cooling capacity
- 18,000 BTU/hr
- CEER
- 14.4
- Mounting
- Straddles Window
- Variable-speed compressor
- Yes
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 17.4¢ | $163 | |
| Alaska | 27.4¢ | $256 | |
| Arizona | 15.5¢ | $145 | |
| Arkansas | 14.2¢ | $133 | |
| California | 35.3¢ | $330 | |
| Colorado | 16.5¢ | $155 | |
| Connecticut | 32.2¢ | $302 | |
| Delaware | 18.8¢ | $176 | |
| District of Columbia | 25.4¢ | $238 | |
| Florida | 15.4¢ | $144 | |
| Georgia | 15.4¢ | $144 | |
| Hawaiipriciest | 46.6¢ | $437 | |
| Idaho | 12.7¢ | $119 | |
| Illinois | 20.5¢ | $192 | |
| Indiana | 17.9¢ | $168 | |
| Iowa | 13.9¢ | $130 | |
| Kansas | 15.8¢ | $148 | |
| Kentucky | 15.0¢ | $141 | |
| Louisiana | 14.4¢ | $135 | |
| Maine | 28.4¢ | $266 | |
| Maryland | 22.1¢ | $207 | |
| Massachusetts | 29.4¢ | $276 | |
| Michigan | 21.4¢ | $201 | |
| Minnesota | 16.4¢ | $154 | |
| Mississippi | 16.8¢ | $157 | |
| Missouri | 14.0¢ | $131 | |
| Montana | 13.9¢ | $130 | |
| Nebraska | 13.3¢ | $125 | |
| Nevada | 14.3¢ | $134 | |
| New Hampshire | 27.2¢ | $255 | |
| New Jersey | 23.5¢ | $221 | |
| New Mexico | 15.2¢ | $142 | |
| New York | 29.4¢ | $276 | |
| North Carolina | 16.3¢ | $152 | |
| North Dakotacheapest | 12.3¢ | $116 | |
| Ohio | 19.5¢ | $183 | |
| Oklahoma | 13.3¢ | $125 | |
| Oregon | 15.8¢ | $148 | |
| Pennsylvania | 21.5¢ | $201 | |
| Rhode Island | 28.3¢ | $265 | |
| South Carolina | 17.1¢ | $160 | |
| South Dakota | 14.5¢ | $136 | |
| Tennessee | 14.9¢ | $140 | |
| Texas | 17.0¢ | $159 | |
| Utah | 13.3¢ | $125 | |
| Vermont | 24.6¢ | $230 | |
| Virginia | 17.4¢ | $163 | |
| Washington | 14.4¢ | $135 | |
| West Virginia | 16.1¢ | $151 | |
| Wisconsin | 19.2¢ | $180 | |
| Wyoming | 14.7¢ | $138 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| Friedrich CCV18A30A | 938 | $177 |
| HEMA DS-2W1822CI | 938 | $177 |
| TCL H18W4KW | 938 | $177 |
| TCL T18WQ2S | 938 | $177 |
| Whirlpool WHAW-181IN | 938 | $177 |
| Friedrich WHVT14B33A | 950 | $179 |
Run your own numbers
Your rate, your numbers
- Per day
- 48¢
- Per month
- $14.72
- Per year
- $177
938 kWh/yr × 18.8¢/kWh = $177/yr
Prefilled with this model's certified 938 kWh/yr — adjust if your usage differs from the DOE test basis. The certified annual kWh assumes 750 cooling hours per year (the DOE standard). In hot climates real usage can run well above that; in mild ones, below.
Questions, answered with the data
- How much electricity does the TCL H18W4KW-CA use?
- ENERGY STAR certifies the TCL H18W4KW-CA at 938 kWh per year. The certified annual kWh assumes 750 cooling hours per year (the DOE standard). In hot climates real usage can run well above that; in mild ones, below.
- How much does the TCL H18W4KW-CA cost to run per month?
- About $14.71 a month at the U.S. average residential rate (18.8¢/kWh) — 48¢ a day, or $177 a year. Your state's rate moves this up or down; see the table above.
- Is the TCL H18W4KW-CA energy efficient?
- It uses 76% more electricity than the median certified room air conditioner, which puts it among the least efficient certified models.
- What does the TCL H18W4KW-CA cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $116 a year in North Dakota (12.3¢/kWh) and $437 in Hawaii (46.6¢/kWh).